Bouncing of the float arm and pulsating of the flow is not too common but if it does occur it is easily remedied. This situation is usually caused from inlet pressure from the pump being excessively high causing a "wave" on the top of the water level. It is more likely to occur while heating strike water than in the mash which tends to dampen out this phenomonon. To remedy this, simply reduce the excessive pressure from the pump by throttling the outlet valve on the pump.